define(function(require, exports, module) {
var mat4 = require("support/matrix");
var triangleVertexPositionBuffer;
var triangleVertices = [
0.0, 1.0, 0.0,
-1.0, -1.0, 0.0,
1.0, -1.0, 0.0
];
var squareVertexPositionBuffer;
var squareVertices = [
1.0, 1.0, 0.0,
-1.0, 1.0, 0.0,
1.0, -1.0, 0.0,
-1.0, -1.0, 0.0
];
var gl;
var mvMatrix = mat4.create();
var pMatrix = mat4.create();
function initGL(canvas) {
try {
gl = canvas.getContext("experimental-webgl");
gl.viewportWidth = canvas.width;
gl.viewportHeight = canvas.height;
} catch (e) {
}
if (! gl) {
alert("Could not initialize WebGL.");
}
}
var shaderProgram;
function initShaders() {
var fragmentShader = getShader(gl, "shader-fs");
var vertexShader = getShader(gl, "shader-vs");
shaderProgram = gl.createProgram();
gl.attachShader(shaderProgram, vertexShader);
gl.attachShader(shaderProgram, fragmentShader);
gl.linkProgram(shaderProgram);
if (! gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
alert("Could not initialize shaders");
}
gl.useProgram(shaderProgram);
shaderProgram.vertexPositionAttribute = gl.getAttribLocation(shaderProgram, "aVertexPosition");
gl.enableVertexAttribArray(shaderProgram.vertexPositionAttribute);
shaderProgram.pMatrixUniform = gl.getUniformLocation(shaderProgram, "uPMatrix");
shaderProgram.mvMatrixUniform = gl.getUniformLocation(shaderProgram, "uMVMatrix");
}
function getShader(gl, id) {
var shaderScript = document.getElementById(id);
if (! shaderScript) {
return null;
}
var str = "";
var k = shaderScript.firstChild;
while (k) {
if (3 === k.nodeType) {
str += k.textContent;
}
k = k.nextSibling;
}
var shader;
if (shaderScript.type === "x-shader/x-fragment") {
shader = gl.createShader(gl.FRAGMENT_SHADER);
} else if (shaderScript.type === "x-shader/x-vertex") {
shader = gl.createShader(gl.VERTEX_SHADER);
} else {
return null;
}
gl.shaderSource(shader, str);
gl.compileShader(shader);
if (! gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
alert(gl.getShaderInfoLog(shader));
return null;
}
return shader;
}
function initBuffers() {
triangleVertexPositionBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, triangleVertexPositionBuffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(triangleVertices), gl.STATIC_DRAW);
triangleVertexPositionBuffer.itemSize = 3;
triangleVertexPositionBuffer.numItems = 3;
squareVertexPositionBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, squareVertexPositionBuffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(squareVertices), gl.STATIC_DRAW);
squareVertexPositionBuffer.itemSize = 3;
squareVertexPositionBuffer.numItems = 4;
}
function drawScene() {
gl.viewport(0, 0, gl.viewportWidth, gl.viewportHeight);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
mat4.perspective(pMatrix, 45, gl.viewportWidth / gl.viewportHeight, 0.1, 100.0);
mat4.identity(mvMatrix);
mat4.translate(mvMatrix, -1.5, 0.0, -7.0);
gl.bindBuffer(gl.ARRAY_BUFFER, triangleVertexPositionBuffer);
gl.vertexAttribPointer(shaderProgram.vertexPositionAttribute, triangleVertexPositionBuffer.itemSize, gl.FLOAT, false, 0, 0);
setMatrixUniforms();
gl.drawArrays(gl.TRIANGLES, 0, triangleVertexPositionBuffer.numItems);
mat4.translate(mvMatrix, 3.0, 0.0, 0.0);
gl.bindBuffer(gl.ARRAY_BUFFER, squareVertexPositionBuffer);
gl.vertexAttribPointer(shaderProgram.vertexPositionAttribute, squareVertexPositionBuffer.itemSize, gl.FLOAT, false, 0, 0);
setMatrixUniforms();
gl.drawArrays(gl.TRIANGLE_STRIP, 0, squareVertexPositionBuffer.numItems);
}
function setMatrixUniforms() {
console.log("Setting perspective matrix: \n" + pMatrix);
gl.uniformMatrix4fv(shaderProgram.pMatrixUniform, false, pMatrix);
console.log("Setting modelview matrix: \n" + mvMatrix);
gl.uniformMatrix4fv(shaderProgram.mvMatrixUniform, false, mvMatrix);
}
function webGLStart() {
var canvas = document.getElementById("canvas");
initGL(canvas);
initShaders();
initBuffers();
gl.clearColor(0.0, 0.0, 0.0, 1.0);
gl.enable(gl.DEPTH_TEST);
drawScene();
};
module.exports = webGLStart;
});
define(function(require, exports, module) {
var Scheduler = require("support/Scheduler");
var mat4 = require("support/matrix");
var pyramidVertexPositionBuffer;
var pyramidVertices = [
// Front face
0.0, 1.0, 0.0,
-1.0, -1.0, 1.0,
1.0, -1.0, 1.0,
// "Right" side face
0.0, 1.0, 0.0,
1.0, -1.0, 1.0,
1.0, -1.0, -1.0,
// "Back" side face
0.0, 1.0, 0.0,
1.0, -1.0, -1.0,
-1.0, -1.0, -1.0,
// "Left" face
0.0, 1.0, 0.0,
-1.0, -1.0, -1.0,
-1.0, -1.0, 1.0
];
var pyramidVertexColorBuffer;
var pyramidColors = [
1.0, 0.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0,
0.0, 0.0, 1.0, 1.0,
1.0, 0.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0,
1.0, 0.0, 1.0, 1.0,
1.0, 0.0, 0.0, 1.0,
1.0, 0.0, 1.0, 1.0,
0.0, 0.0, 1.0, 1.0,
0.0, 0.0, 1.0, 1.0,
0.0, 1.0, 0.0, 1.0,
1.0, 0.0, 1.0, 1.0
];
var cubeVertexPositionBuffer;
var cubeVertices = [
// Front face
-1.0, -1.0, 1.0,
1.0, -1.0, 1.0,
1.0, 1.0, 1.0,
-1.0, 1.0, 1.0,
// Back face
-1.0, -1.0, -1.0,
-1.0, 1.0, -1.0,
1.0, 1.0, -1.0,
1.0, -1.0, -1.0,
// Top face
-1.0, 1.0, -1.0,
-1.0, 1.0, 1.0,
1.0, 1.0, 1.0,
1.0, 1.0, -1.0,
// Bottom face
-1.0, -1.0, -1.0,
1.0, -1.0, -1.0,
1.0, -1.0, 1.0,
-1.0, -1.0, 1.0,
// Right face
1.0, -1.0, -1.0,
1.0, 1.0, -1.0,
1.0, 1.0, 1.0,
1.0, -1.0, 1.0,
// Left face
-1.0, -1.0, -1.0,
-1.0, -1.0, 1.0,
-1.0, 1.0, 1.0,
-1.0, 1.0, -1.0
];
var cubeVertexColorBuffer;
var faceColors = [
[1.0, 0.5, 0.5, 1.0],
[0.5, 1.0, 0.5, 1.0],
[0.5, 0.5, 1.0, 1.0],
[1.0, 1.0, 0.5, 1.0],
[1.0, 0.5, 1.0, 1.0],
[0.5, 1.0, 1.0, 1.0]
];
var cubeColors = [];
for (var color in faceColors) {
for (var idx = 0; idx < 4; ++idx) {
cubeColors = cubeColors.concat(faceColors[color]);
}
}
var cubeVertexIndexBuffer;
var cubeIndices = [
0, 1, 2, 0, 2, 3,
4, 5, 6, 4, 6, 7,
8, 9, 10, 8, 10, 11,
12, 13, 14, 12, 14, 15,
16, 17, 18, 16, 18, 19,
20, 21, 22, 20, 22, 23
];
var gl;
var mvMatrix = mat4.create();
var pMatrix = mat4.create();
var rPyramid = 0;
var rCube = 0;
var shaderProgram;
var mvMatrixStack = [];
function mvPushMatrix() {
var copy = mat4.clone(mvMatrix);
mvMatrixStack.push(copy);
}
function mvPopMatrix() {
if (0 === mvMatrixStack.length) {
throw "Invalid popMatrix";
}
mvMatrix = mvMatrixStack.pop();
}
function initGL(canvas) {
try {
gl = canvas.getContext("experimental-webgl");
gl.viewportWidth = canvas.width;
gl.viewportHeight = canvas.height;
} catch (e) {
}
if (! gl) {
alert("Could not initialize WebGL.");
}
}
function initShaders() {
var fragmentShader = getShader(gl, "shader-fs");
var vertexShader = getShader(gl, "shader-vs");
shaderProgram = gl.createProgram();
gl.attachShader(shaderProgram, vertexShader);
gl.attachShader(shaderProgram, fragmentShader);
gl.linkProgram(shaderProgram);
if (! gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
alert("Could not initialize shaders");
}
gl.useProgram(shaderProgram);
shaderProgram.vertexPositionAttribute = gl.getAttribLocation(shaderProgram, "aVertexPosition");
gl.enableVertexAttribArray(shaderProgram.vertexPositionAttribute);
shaderProgram.vertexColorAttribute = gl.getAttribLocation(shaderProgram, "aVertexColor");
gl.enableVertexAttribArray(shaderProgram.vertexColorAttribute);
shaderProgram.pMatrixUniform = gl.getUniformLocation(shaderProgram, "uPMatrix");
shaderProgram.mvMatrixUniform = gl.getUniformLocation(shaderProgram, "uMVMatrix");
}
function getShader(gl, id) {
var shaderScript = document.getElementById(id);
if (! shaderScript) {
return null;
}
var str = "";
var k = shaderScript.firstChild;
while (k) {
if (3 === k.nodeType) {
str += k.textContent;
}
k = k.nextSibling;
}
var shader;
if (shaderScript.type === "x-shader/x-fragment") {
shader = gl.createShader(gl.FRAGMENT_SHADER);
} else if (shaderScript.type === "x-shader/x-vertex") {
shader = gl.createShader(gl.VERTEX_SHADER);
} else {
return null;
}
gl.shaderSource(shader, str);
gl.compileShader(shader);
if (! gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
alert(gl.getShaderInfoLog(shader));
return null;
}
return shader;
}
function initBuffers() {
pyramidVertexPositionBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, pyramidVertexPositionBuffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(pyramidVertices), gl.STATIC_DRAW);
pyramidVertexPositionBuffer.itemSize = 3;
pyramidVertexPositionBuffer.numItems = 12;
pyramidVertexColorBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, pyramidVertexColorBuffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(pyramidColors), gl.STATIC_DRAW);
pyramidVertexColorBuffer.itemSize = 4;
pyramidVertexColorBuffer.numItems = 12;
cubeVertexPositionBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexPositionBuffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(cubeVertices), gl.STATIC_DRAW);
cubeVertexPositionBuffer.itemSize = 3;
cubeVertexPositionBuffer.numItems = 24;
cubeVertexColorBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexColorBuffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(cubeColors), gl.STATIC_DRAW);
cubeVertexColorBuffer.itemSize = 4;
cubeVertexColorBuffer.numItems = 24;
cubeVertexIndexBuffer = gl.createBuffer();
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, cubeVertexIndexBuffer);
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(cubeIndices), gl.STATIC_DRAW);
cubeVertexIndexBuffer.itemSize = 1;
cubeVertexIndexBuffer.numItems = 36;
}
function drawScene() {
gl.viewport(0, 0, gl.viewportWidth, gl.viewportHeight);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
mat4.perspective(pMatrix, 45, gl.viewportWidth / gl.viewportHeight, 0.1, 100.0);
mat4.identity(mvMatrix);
mat4.translate(mvMatrix, -1.5, 0.0, -7.0);
mvPushMatrix();
mat4.rotate(mvMatrix, rPyramid, 1, 1, 0);
gl.bindBuffer(gl.ARRAY_BUFFER, pyramidVertexPositionBuffer);
gl.vertexAttribPointer(shaderProgram.vertexPositionAttribute, pyramidVertexPositionBuffer.itemSize, gl.FLOAT, false, 0, 0);
gl.bindBuffer(gl.ARRAY_BUFFER, pyramidVertexColorBuffer);
gl.vertexAttribPointer(shaderProgram.vertexColorAttribute, pyramidVertexColorBuffer.itemSize, gl.FLOAT, false, 0, 0);
setMatrixUniforms();
gl.drawArrays(gl.TRIANGLES, 0, pyramidVertexPositionBuffer.numItems);
mvPopMatrix();
mat4.translate(mvMatrix, 3.0, 0.0, 0.0);
mvPushMatrix();
mat4.rotate(mvMatrix, rCube, 1, 1, 1);
gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexPositionBuffer);
gl.vertexAttribPointer(shaderProgram.vertexPositionAttribute, cubeVertexPositionBuffer.itemSize, gl.FLOAT, false, 0, 0);
gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexColorBuffer);
gl.vertexAttribPointer(shaderProgram.vertexColorAttribute, cubeVertexColorBuffer.itemSize, gl.FLOAT, false, 0, 0);
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, cubeVertexIndexBuffer);
setMatrixUniforms();
gl.drawElements(gl.TRIANGLES, cubeVertexIndexBuffer.numItems, gl.UNSIGNED_SHORT, 0);
mvPopMatrix();
}
var lastTime = 0;
function animate() {
var now = Date.now();
if (0 === lastTime) {
lastTime = now;
return;
}
var dt = now - lastTime;
rPyramid += (Math.PI / 2) * dt * 0.001;
rCube -= (75 * Math.PI / 180) * dt * 0.001;
lastTime = now;
}
function setMatrixUniforms() {
//console.log("Setting perspective matrix: \n" + pMatrix);
gl.uniformMatrix4fv(shaderProgram.pMatrixUniform, false, pMatrix);
//console.log("Setting modelview matrix: \n" + mvMatrix);
gl.uniformMatrix4fv(shaderProgram.mvMatrixUniform, false, mvMatrix);
}
function webGLStart() {
var canvas = document.getElementById("canvas");
initGL(canvas);
initShaders();
initBuffers();
gl.clearColor(0.0, 0.0, 0.0, 1.0);
gl.enable(gl.DEPTH_TEST);
Scheduler.addAnimationTask(function() {
drawScene();
animate();
});
};
module.exports = webGLStart;
});